Single-crystal Raman spectroscopy and X-ray crystallography at beamline X26-C of the NSLS

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Abstract

Three-dimensional structures derived from X-ray diffraction of protein crystals provide a wealth of information. Features and interactions important for the function of macromolecules can be deduced and catalytic mechanisms postulated. Still, many questions can remain, for example regarding metal oxidation states and the interpretation of mystery density, i.e. ambiguous or unknown features within the electron density maps, especially at ∼2 Å resolutions typical of most macromolecular structures. Beamline X26-C at the National Synchrotron Light Source (NSLS), Brookhaven National Laboratory (BNL), provides researchers with the opportunity to not only determine the atomic structure of their samples but also to explore the electronic and vibrational characteristics of the sample before, during and after X-ray diffraction data collection. When samples are maintained under cryo-conditions, an opportunity to promote and follow photochemical reactions in situ as a function of X-ray exposure is also provided. Plans are in place to further expand the capabilities at beamline X26-C and to develop beamlines at NSLS-II, currently under construction at BNL, which will provide users access to a wide array of complementary spectroscopic methods in addition to high-quality X-ray diffraction data.

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Stoner-Ma, D., Skinner, J. M., Schneider, D. K., Cowan, M., Sweet, R. M., & Orville, A. M. (2011). Single-crystal Raman spectroscopy and X-ray crystallography at beamline X26-C of the NSLS. In Journal of Synchrotron Radiation (Vol. 18, pp. 37–40). https://doi.org/10.1107/S0909049510033601

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